[alsa-devel] Problems with snd-hda-intel on hp 6930p (2.6.30)

[Rafael J. Wysocki]

On Tuesday 30 June 2009, Rafael J. Wysocki wrote:
> On Tuesday 30 June 2009, Takashi Iwai wrote:
> > At Mon, 29 Jun 2009 20:37:09 +0200,
> > Rafael J. Wysocki wrote:
> > > 
> > > Hi Takashi,
> > > 
> > > I have a problem with snd-hda-intel from 2.6.30 on an hp EliteBook 6930p, which
> > > is that the sound is not audible, although everything appears to work just
> > > fine.  Except maybe that when the box is rebooted and KDE (3.5) is started,
> > > the master control is "muted" and the led indicator next to the keyboard shows
> > > "no sound".  Then, changing the "muted" status of the master control doesn't
> > > change the state of the led indicator and vice versa (the two things appear to
> > > be totally independent of each other).
> > > 
> > > Can you please tell me what I can do to debug this issue?
> > 
> > Could you run alsa-info.sh with --no-upload option on both "muted"
> > and "not muted" states, and attach the generated files?
> 
> Sure.  In the meantime it turned out that after a power off and cold boot the
> status of the master control is 'on', but the led indicator shows 'no sound', so
> there are 5 outputs:
> * alsa-info-postboot.txt - after power off and cold boot
> * alsa-info-led.txt - led indicator switched to 'on' when it was in the
>   alsa-info-postboot.txt state
> Now I switched to AC power and rebooted the box without powering off:
> * alsa-info-muted.txt - initial state with the 'muted' master control
> * alsa-info-on.txt - master control switched to 'on' when it was in the
>   alsa-info-muted.txt state
> * alsa-info.txt - led indicator switched to 'on' when it was in the
>   alsa-info-on.txt state
> 
> > If it's a regression (heh :), please give alsa-info.sh output on
> > older kernels.
> 
> No, it's not a regression.  At least not from 2.6.27.
> 
> Please let me know if you need more information.

One more thing.  The headphones output actually works regardless of the
led indicator status, so only the built-in speakers output seems to be
affected.

Thanks,
Rafael